Fall back to kexec when no kexec binary exists

Arusekk · keszybz · commit 71180f8e57f8 · 2020-03-24T09:50:11.000+01:00
This may be not a popular setup, but in case kexec resides somewhere different
than the default location for KEXEC (`/usr/sbin/kexec`), don't just reboot and
try doing `reboot(RB_KEXEC)` instead, just like what `kexec -e` normally does.
diff --git a/src/shutdown/shutdown.c b/src/shutdown/shutdown.c
@@ -547,6 +547,9 @@ int main(int argc, char *argv[]) {
                                 /* Child */
 
                                 execv(args[0], (char * const *) args);
+
+                                /* execv failed (kexec binary missing?), so try simply reboot(RB_KEXEC) */
+                                (void) reboot(cmd);
                                 _exit(EXIT_FAILURE);
                         }
 

Original file line number	Diff line number	Diff line change
`@@ -547,6 +547,9 @@ int main(int argc, char *argv[]) {`
`547`	`547`	`/* Child */`
`548`	`548`
`549`	`549`	`execv(args[0], (char * const *) args);`
	`550`	`+`
	`551`	`+ /* execv failed (kexec binary missing?), so try simply reboot(RB_KEXEC) */`
	`552`	`+ (void) reboot(cmd);`
`550`	`553`	`_exit(EXIT_FAILURE);`
`551`	`554`	`}`
`552`	`555`